As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PRE-FLIGHT INSPECTIONS AND MAINTENANCE LINE TECH REPORTED RIGHT AFT EMERGENCY LIGHTS INOPERATIVE. PER B757 FAULT ISOLATION MANUAL 33-51-802 REMOVED AND REPLACED BATTERY PACK IN POWER SUPPLY IAW B757 AIRCRAFT MAINTENANCE MANUAL 33-51-07. OPERATIONAL CHECK GOOD. NO ADDITIONAL FAULTS NOTED.